#pragma once

#include <iostream>
#include <signal.h>
#include <functional>
#include <unistd.h>
#include <string>
#include "log.hpp"
#include "Socket.hpp"

using func_t = std::function<std::string(std::string &package)>;

class TcpServer
{
public:
    TcpServer(uint16_t port, func_t callback)
        : _port(port), _callback(callback)
    {
    }
    ~TcpServer()
    {
    }
    bool InitServer()
    {
        _listensock.Socket();
        _listensock.Bind(_port);
        _listensock.Listen();
        lg(Info, "init server ... done");
        return true;
    }
    void Start()
    {
        signal(SIGCHLD, SIG_IGN);
        signal(SIGPIPE, SIG_IGN);

        while (true)
        {
            std::string clientip;
            uint16_t clientport;

            int sockfd = _listensock.Accept(clientip, clientport);
            if (sockfd < 0)
                continue;
            lg(Info, "accept a new link, sockfd: %d, clientip: %s, clientport: %d", sockfd, clientip.c_str(), clientport);

            // 提供服务
            if (fork() == 0)
            {
                _listensock.Close();
                std::string inbuffer_stream;
                // 数据接收并响应
                while (true)
                {
                    // 读取
                    char buffer[1280];
                    ssize_t n = read(sockfd, buffer, sizeof(buffer));
                    if (n > 0)
                    {
                        buffer[n] = 0;
                        inbuffer_stream += buffer;

                        lg(Debug, "debug:\n%s", inbuffer_stream.c_str());

                        while (true)
                        {
                            std::string info = _callback(inbuffer_stream);
                            if (info.empty())
                                break;

                            write(sockfd, info.c_str(), info.size());
                        }
                    }
                    else if (n == 0)
                        break;
                    else
                        break;
                }
                exit(0);
            }
            close(sockfd);
        }
    }

private:
    uint16_t _port;
    Sock _listensock;
    func_t _callback;
};